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Fast Idle Out of Spec When Cold



SYMPTOM: Cold Fast Idle Out Of Specifications.

CHECK
1. Electronic Control Module (**)
2. Fast Idle Thermo Valve
3. Idle Air Control (IAC) Valve (14)
4. Engine Coolant Temperature (ECT) Sensor (6)

Numbers in parentheses are the blink codes displayed at the MALFUNCTION INDICATOR LAMP. (**) MALFUNCTION INDICATOR LAMP on without blinking. Notes on Reading Diagnostic List For ECM trouble code component testing procedures see COMPUTERS AND CONTROL SYSTEMS.